Xsquared - 11x - 42

I am sooooo stuck on this question in my maths homework! I know it's a really easy one probably but I can't seem to do it! It's about factorising,
I don't know where the squared key on the p.c. is so im going to put squared after the x to represent x squared

xsquared - 11x - 42

I know because of the x squared it has to be two sets of brackets each with x in the front and it has to be two numbers that add to make -11 and times to make -42 I THINK